Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: BUG: unable to handle kernel paging request in z_erofs_decompress_queue
BUG: unable to handle page fault for address: fffff52101a3fff9 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23ffed067 P4D 23ffed067 PUD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 4398 Comm: kworker/u5:1 Not tainted 6.3.0-rc6-syzkaller-g09a9639e56c0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Workqueue: erofs_worker z_erofs_decompressqueue_work RIP: 0010:z_erofs_decompress_queue+0xb7e/0x2b40 Code: 0a 48 8b 7c 24 68 e8 51 fe 00 fe 89 db 48 c1 e3 03 48 03 9c 24 20 03 00 00 49 89 de 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df <41> 80 3c 06 00 74 08 48 89 df e8 23 fe 00 fe 48 83 3b 00 0f 84 a1 RSP: 0018:ffffc90006a5f7c0 EFLAGS: 00010a06 RAX: dffffc0000000000 RBX: ffffc9080d1fffc8 RCX: 1ffff92000d4bf5c RDX: ffff88802b800000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90006a5fbb0 R08: ffffffff83ddecfa R09: fffff52001a40000 R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000ffff8f00 R13: ffff888073fad0b8 R14: 1ffff92101a3fff9 R15: ffffea0001b54b40 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff52101a3fff9 CR3: 000000002b4b9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> z_erofs_decompressqueue_work+0x99/0xe0 process_one_work+0x8f6/0x1170 worker_thread+0xa63/0x1210 kthread+0x270/0x300 ret_from_fork+0x1f/0x30 </TASK> Modules linked in: CR2: fffff52101a3fff9 ---[ end trace 0000000000000000 ]--- RIP: 0010:z_erofs_decompress_queue+0xb7e/0x2b40 Code: 0a 48 8b 7c 24 68 e8 51 fe 00 fe 89 db 48 c1 e3 03 48 03 9c 24 20 03 00 00 49 89 de 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df <41> 80 3c 06 00 74 08 48 89 df e8 23 fe 00 fe 48 83 3b 00 0f 84 a1 RSP: 0018:ffffc90006a5f7c0 EFLAGS: 00010a06 RAX: dffffc0000000000 RBX: ffffc9080d1fffc8 RCX: 1ffff92000d4bf5c RDX: ffff88802b800000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90006a5fbb0 R08: ffffffff83ddecfa R09: fffff52001a40000 R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000ffff8f00 R13: ffff888073fad0b8 R14: 1ffff92101a3fff9 R15: ffffea0001b54b40 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff52101a3fff9 CR3: 000000002b4b9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 48 8b 7c 24 68 mov 0x68(%rsp),%rdi 5: e8 51 fe 00 fe callq 0xfe00fe5b a: 89 db mov %ebx,%ebx c: 48 c1 e3 03 shl $0x3,%rbx 10: 48 03 9c 24 20 03 00 add 0x320(%rsp),%rbx 17: 00 18: 49 89 de mov %rbx,%r14 1b: 49 c1 ee 03 shr $0x3,%r14 1f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 26: fc ff df * 29: 41 80 3c 06 00 cmpb $0x0,(%r14,%rax,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 df mov %rbx,%rdi 33: e8 23 fe 00 fe callq 0xfe00fe5b 38: 48 83 3b 00 cmpq $0x0,(%rbx) 3c: 0f .byte 0xf 3d: 84 .byte 0x84 3e: a1 .byte 0xa1 Tested on: commit: 09a9639e Linux 6.3-rc6 git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ v6.3-rc6 console output: https://syzkaller.appspot.com/x/log.txt?x=1125d353c80000 kernel config: https://syzkaller.appspot.com/x/.config?x=174dd96f08254844 dashboard link: https://syzkaller.appspot.com/bug?extid=aafb3f37cfeb6534c4ac compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 Note: no patches were applied.
